I have not time now to make a complete report in English, but cool is that you can see water temperature, true digital speed, true rpm speed, true consumption,date and week of manufacturing,residual amount of liters in the fuel tank and many other factors. Sorry too late now for me to make the translation of what I found. Sure I will do in another moment.
Here the list:

The reset button for the partial km will be named from now : 'T'.
START:
1: insert the ig.key into the slot pushing in the meantime the T button. You enter into the secret menu. It will appear a code like for example ZB12345.
2: You have to add all the numbers you see. Example:12345 = 1+2+3+4+5 = 15.
Remember this sum.
3: Push 'T' several times untill you will see the menu n.19. Wait for about 2 seconds.
4: it will appear the sentence : "lock on" and after other 2 sec. "code 00".
5ush the "T" button how many times like the sum you got before (in this case : 15).Ok now you have entered into the secret menu.
Now the menu will go automatically to menu number 01.
6: push the "T" button for example 7 times and wait for some seconds untill you will enter into the sub-menu 7.1- 7,2 etc . In this area you will see the water temperature...For the complete list read the precedent post.

Note: when the car is not with the engine running, make a test with the menu n. 2....Very spectacular....

I personally have only used it to see the true speed of the car, as the speedometer always reads higher by a certain percentage than how fast you are actually going.

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Ordered June 3 '06: E92 335i Saph Blk, Jade Grey lthr, poplar grey trim, 6spd, Sports Pkg, CA.
Update Sept 29 '06: Got the car...It rocks!!
Update Sept 08: Moved to Whitehorse and had to buy out of my lease. Miss the car a lot. Will return to BMW family in a couple of years.

The reset button for the partial km will be named from now : 'T'.
START:
1: insert the ig.key into the slot pushing in the meantime the T button. You enter into the secret menu. It will appear a code like for example ZB12345.
2: You have to add all the numbers you see. Example:12345 = 1+2+3+4+5 = 15.
Remember this sum.
3: Push 'T' several times untill you will see the menu n.19. Wait for about 2 seconds.
4: it will appear the sentence : "lock on" and after other 2 sec. "code 00".
5ush the "T" button how many times like the sum you got before (in this case : 15).Ok now you have entered into the secret menu.
Now the menu will go automatically to menu number 01.
6: push the "T" button for example 7 times and wait for some seconds untill you will enter into the sub-menu 7.1- 7,2 etc . In this area you will see the water temperature...For the complete list read the precedent post.

Note: when the car is not with the engine running, make a test with the menu n. 2....Very spectacular....

when the car is not with the engine running, make a test with the menu n. 2....Very spectacular....

It's like a Christmas tree , we tested the secret menu yesterday, cool stuff! However, if 1.4 is data di produzione, ours is 29/11/2007 and we ordered the car on the 24/11/2007 (which was Saturday so the order left only the week after probably on 27 or 28/11) which means that either BMW is really quick executing the orders or we were actually REALLY lucky and got a car that was already planned to go on the production line. Or maybe it was just simply a match made in heaven

It's like a Christmas tree , we tested the secret menu yesterday, cool stuff! However, if 1.4 is data di produzione, ours is 29/11/2007 and we ordered the car on the 24/11/2007 (which was Saturday so the order left only the week after probably on 27 or 28/11) which means that either BMW is really quick executing the orders or we were actually REALLY lucky and got a car that was already planned to go on the production line. Or maybe it was just simply a match made in heaven

I certainly don't want to rain on heaven but it could be your dealer updated it prior to delivery!

I certainly don't want to rain on heaven but it could be your dealer updated it prior to delivery!

That I very much doubt, what would he gain with that ? Nothing at all. When we ordered the car he told us the delivery date given by BMW Germany was in February (normal 3 months waiting) but we actually received the car already in mid-January. So I believe the Germans are just very efficient !

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“You only live once, but if you do it right, once is enough.” Mae West
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